How to fix a frozen engine?

Put engine into warm area like a heated garage. Let thaw. Once thawed. Apply small amount of pressure using a coolant pressure tester and check engine over very carefully for leaks. If needed use a dye to help locate any leaks. Repair any leaks if possible. If not repairable then engine block will need to be replaced.

A frozen internal combustion engine needs to thaw in order to start again. We can only accelerate this thawing process by warming up the engine as much as we can. For example, we can blow hot air on the engine by using a hair dryer. We can direct sunlight on the engine to warm it up.